Digger or scraper.



" PATENTBD ocra-1, 1907.'

o. H. GUNN.I BIGGER. 0R SGRAPBR.

APPLICATION FILED FEB. 4, 1907.

3 SHEETS-SHEBT 2.

wu m G d. H, GUNN. BIGGER 0R SCRAPER.` APPLICATION FILED FEB. 4, 1907.

. vPATBNTED OG T. 1, 1907.

3 SHEETS-:SHEET 3,

-` parts in all the views;

Be it known' that L'CHALES GiI'JNN, a citizen o fv the United States, residing at Marysville, in the county of Yuba and State of California, have invented certainv new and useful`l'mprovements in Diggers or Scrapers; and I do declare the following to be a full, clear, and

exact description of the invention, sucl will enable others skilled inthe art towhich it appertains'to make and use the' same, reference being had to the accom- 10,

panying drawings, and to the letters and figures of reference marked thereon, which forma part of this spcciv ficatiom- .i i

invention relatesto improvements in digging -or scraping apparatus and the invention will'be fully understood by reference tothe .accompanying drawing in which, v Figure.' 1 isa topl plan view of my-improved apparatus.A

- Fig, 2 is a geen@ tekenen thai-line A2--2: Fig. 1. rige is. a sectional view illustrating `a part of the apparatus shown on alarger scale... 'Fig'. f1 is a central longitudinal section takenon theline 4-4- Fig. 1=. i Fig. 5 is a section taken throughv oneof the end Ldrums.ofr,shafts showing .the operating pulley in side elevation. Y Fig. 6 is a v-ew of the same construetion'looking at the'edge of thewheel or at right angles to Fig. l5.A

The same referencev` characters indicate the same Let the-numeral 5 designate ground wheels mounted on an axle 6 upon whiehis mounted an upright 'frame 7 to whichis secured a longitudinally disposed carrier frame 8 in the extremities of'which ar'ejournaled shafts 9 and 10, te which are made fast sprocket 'wheels l2 two sprockets on each shaft 9 and they are located near the opposite extremity of the shaft. The chains 13 are lconnectedby slats 14 which formifiights and engage a plate 15 secured to the frame 8 and located between the sides of the said frame. The extremities of the plate' 15,

1. occupy positions'v in close proximity to the frespective 'carrier shafts 9 and 10. To theopposite extremities of the carriershaft'9, are

. lsecured pulley wheelsor sheaves 16 which are provided near their outer' peripheries with wrist pins'1-7 to which A are connected the vtwo members 18 of a pitman yoke provided with across bar 19 connecting the two arms of the pitman. From this cross bar the' pitrnan arms exl tend rearwardly as shownat18*`, their 4rear extremities being pivotally connected 'asshown at' 2 0 with an arm 21 connected with the digger` o1' scraper 22 by means of bolts 23. The arm 21 extends forwardly between the pitmanarm'slS To the last named arms is'secured a U-shaped upwardly projecting frame v24in which -is threaded an adjusting screw 25, the lower extremity of I the screw being journaled inthe 'digger arm 21. T he upper extremity of this screw is provided with a crank Specication'of Letters Patent. Application ned February 4,1901. seran 110.355.747.

ging or scraping device.

`than .the forward portions thereof.

which are engaged by' endless chains 13.` There are *CHARLES* H. GUNN, 0F 'MAnYsvlI-.Ln,CALIFORNIA.

' BIGGER. onscnA-Pnn. '3?' armv 2 6 for manipulating purposes. By turning this Patentedoet. 1,1907.

Bfcrew, the angle of the-arm 21 with the pitmanarms 18 .may be regulated. The arm 21 is freely movable bctween the pitmanarins 18f by t-he use of the adjusting screw 25. -Y W he n, however, 'the arm 21 is properly adjusted with reference to the p itman arms, this relation isfmantainedvby means of the screw. The scraper or digger-proper extends downwardly from lthe rear exs digging extremity with a detachable blade 27. Most ofthe wear upon the digging Aor scraping device proper,

- comes upon-this blade and when the latter becomes worn 'and is no longer fit for use, it may be .removed and a new one substituted ata comparatively small expense,

thus obviating the expense of renewing the entire, dig-4 The arm 21 is .1I-shaped in cross section, and between at'its opposite extremities which may be formed by bending down'the top wall of the integral inverted tremity of the arm 2l, and-is provided at, its lower or lthe opposite side members of this arm is located an inf- A vertedptrough-shaped guide 28 having cams -29and 30 trough-shaped structure, slits being formed to pcr,mit q thebending downof the top wall. This guide is pivf otally connectedwith the arm`21by means of the vpivot pin 20 which forms the connection between the pitman yoke and the said Varm.

vA wheel v31 is mounted to rotate', being supported by 'a shaft 32 engaging the side walls of the frame 8,tl1e rear portions bf the said side walls being considerably.higher 4 This wheel 31 cngagesv the guide 28, and forms a. rolling support for the digger arm during the operation of the machine. This wheel31 by virtue of its engagementwith the member 28, forms-a guidewheel whereby the digger or scraper arinis prevented from moving laterally in either Adirectionduring the `operation of the machine. 1t will be understood thatv when the digger arm is raised the guide .trough is free to -move downwardly and maintain its position with reference to the wheel 31, the latter i'n connection with the trough still forming aguide whereby the digger or scraper arm is held in proper aline- '.Th endless carrier, together with thel digger 4or scraper mechanism proper, is operated from an engine or motor 33, mounted on-the axle 6 between the wheels of the-vehicle. Upon thepower shaft 34 of this motor are mounted pulley wheels o r sheaves 35 which are connected with the sheaves 16'mounted on the shafti) of the endless carrier. Hence when the power shaft 34 is rotated, the shaft 9 'and the endless carrier areactuatcd.

The rotation ofthe sheaves 16, also Vimpartsv a reciprocating movement to the digger or scraper mechanism,

through the instrumentality of the pitman yoke as heretofore described, while the guide Wheel 31 together with the troughishaped guide engaging the same, im-

1o' ar blade' w Sink im@ the earth, then as. the digger n moved forwardly by thevco'ntinued rotation of the sheaves 16, the digger carriesthe dirt toward the lowerextremity of the carrier, and just as the digger reaches the carrier, the guide wheel 3l engages the cam 29 of` -the trough-shaped guide which cam imparts a sudden `upward movement to the digger which has also a slight forward movement, thus throwing the dirt upon the'A carrier. The iiights'of this carrier being in continuous `operation, drag the dirt upwardly over the plate 15,- and discharge -it at the-upperextremity of the said plate, Wagons may be driven along in order to receive this discharge or` it may f all upon any device for removing it or upon the ground as may be desired. v

As shown in the drawing the digger or scraper 22 is 25 further connected with the arm 2l by Vtie rods 21A whose upper extremities are connected with the said arm by one ofthe bolts 23 While the lower extremities of the rods, pass through the digger and are headed onthe outside.' VIt is Aevident that the function of these rods,

is to strengthen this part of the structure which it will mounted thereon, ywheels also mounted on the frame, ay

scraper or digger, a pitman connection betweenthe latter :md the wheels, and means for preventing the lateral dis'- plzlcclneut of the digger during the operation of the machine. substantially as described.

, as described.

3. In apparatus of the class described, thc combination with a trarne, an endless conveyor mounted thereon, wheels for operating the conveyor, a digger or scraper', and a pitman connection between the lutter. :1nd the snid opcrnting wheels, substantially as described. l

4, The combination of a frame, :in endless conveycr mounted thereon, wheels connected with 'the conveyor shaft at one'extremlty, a digger or scraper, a pitmnn con- `conveyer, n digger provided with azforwardly projecting arm, a pitman adjustably connected with `the digger at one extremity; the 'opposite extremity -ot the pitman having a crank connection with the said`wheeis, substantially us described. l

6. The combination with aframe, a conveys!` mounted thereon, wheels for operating the convcyer, a digger having a forwardly projecting arm, x1 pitman connecting the digger with the said wheels, a guide wheel journaled in` theframe intermediate its extremities, n trough-shaped guide' pivotally connected with the digger arm, whereby 'the guideis adapted to swing independently of the said arm',. th`e guide engaging the guide wheel and being provided with cam members at its extremities for controlling' the manipulation of the digger during machine, substantially as described.

7. The combination with s frame, operating wheels mounted thereon, 'a digger or scraper, a crank connection between thedigger or scrape'r and the operating wheels the operation of thc for imparting a reciprocating movement to the digger or scraper, sndsuitabie means acting on the-lntter to produce a vertical movement simultaneously with the reciprocating action imparted by the operating wheel, substantially 8. The combination with n suitable frame, of operating wheels mounted thereon, a digger or scraper provided with a forwardly profecting arm, a pitman having x1 crank connection with `the operating wheels, und an adjustable connection between the pitman hnd'the'dlggcr arm, substantially as described,

In testimony whereof I aiiix my signatixre in presence of two witnesses.A l

' CHARLES: n. GUNN.l

Witnesses: FRANK LANE,

C. S. iNGLnnociL- 

